Android学习笔记-常用控件

单选按钮 Radio

        <RadioGroup 
            android:id="@+id/genderGroup"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <RadioButton 
                android:id="@+id/femaleButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/female"/>
            
            <RadioButton 
                android:id="@+id/maleButton"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/male"/>
        </RadioGroup>

		genderGroup = (RadioGroup) findViewById(R.id.genderGroup);
		maleButton = (RadioButton) findViewById(R.id.maleButton);
		femaleButton = (RadioButton) findViewById(R.id.femaleButton);
		//...
		genderGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

					@Override
					public void onCheckedChanged(RadioGroup group, int checkedId) {
						// TODO Auto-generated method stub
						if (femaleButton.getId() == checkedId) {
							System.out.println("female");
							Toast.makeText(MainActivity.this, "female",
									Toast.LENGTH_SHORT).show();
						} else if (maleButton.getId() == checkedId) {
							System.out.println("female");
							Toast.makeText(MainActivity.this, "male",
									Toast.LENGTH_SHORT).show();
						}
					}
				});

多选 CheckBox

        <CheckBox 
            android:id="@+id/swim"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/genderGroup"
            android:text="@string/swim"/>
        
        <CheckBox 
            android:id="@+id/read"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/swim"
            android:text="@string/read"/>
        
        <CheckBox 
            android:id="@+id/run"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/read"
            android:text="@string/run"/>

		swimBox = (CheckBox) findViewById(R.id.swim);
		runBox = (CheckBox) findViewById(R.id.run);
		readBox = (CheckBox) findViewById(R.id.read);
		//...
				swimBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			@Override
			public void onCheckedChanged(CompoundButton buttonView,
					boolean isChecked) {
				// TODO Auto-generated method stub
				if (isChecked) {
					System.out.println("Swim is checked");
				} else {
					System.out.println("Swim is unchecked");
				}
			}
		});

		readBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			@Override
			public void onCheckedChanged(CompoundButton buttonView,
					boolean isChecked) {
				// TODO Auto-generated method stub
				if (isChecked) {
					System.out.println("Read is checked");
				} else {
					System.out.println("Read is unchecked");
				}
			}
		});

		runBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

			@Override
			public void onCheckedChanged(CompoundButton buttonView,
					boolean isChecked) {
				// TODO Auto-generated method stub
				if (isChecked) {
					System.out.println("Run is checked");
				} else {
					System.out.println("Run is unchecked");
				}
			}
		});
	}

进度条 ProgressBar

<ProgressBar 
    android:id="@+id/firstBar"
    
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:visibility="gone"/>

<ProgressBar 
    android:id="@+id/secondBar"
    
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_below="@id/firstBar"
    android:visibility="gone"/>

<Button android:id="@+id/myButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/secondBar"
    android:text="开始"/>

public class MainActivity extends ActionBarActivity {

	private ProgressBar firstBar = null;
	private ProgressBar secondBar = null;
	private Button myButon = null;
	private int i = 0;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		firstBar = (ProgressBar) findViewById(R.id.firstBar);
		secondBar = (ProgressBar) findViewById(R.id.secondBar);
		myButon = (Button) findViewById(R.id.myButton);
		
		myButon.setOnClickListener(new ButtonListener());
	}
	
	class ButtonListener implements OnClickListener{
		
		@Override
		public void onClick(View v) {
			if (i == 0) {
				firstBar.setVisibility(View.VISIBLE);
				secondBar.setVisibility(View.VISIBLE);
			}else if (i < firstBar.getMax()) {
				//设置朱进度条的值
				firstBar.setProgress(i);
				//设置第二进度条的值
				secondBar.setSecondaryProgress(i + 10);
				//默认的进度条无法显示进行的状态
				//secondBar.setProgress(i);
			}else {
				firstBar.setVisibility(View.GONE);
				secondBar.setVisibility(View.GONE);
			}
			i = i + 10;
		}
	}

}

列表 ListView

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <LinearLayout 
        android:id="@+id/ListLinearLayout"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">
        
        <ListView android:id="@+id/android:list"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:drawSelectorOnTop="false"
            android:scrollbars="vertical"/>
    </LinearLayout>
</LinearLayout>

user.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    <TextView 
        android:id="@+id/user_name"
        android:layout_width="180dip"
        android:layout_height="30dip"
        android:textSize="10pt"
        android:singleLine="true"/>
   <TextView 
        android:id="@+id/user_ip"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:textSize="10pt"
        android:gravity="right"/> 

</LinearLayout>

MainActivity.java

public class MainActivity extends ListActivity{

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		ArrayList<HashMap<String, String>> list = new ArrayList<HashMap<String,String>>();
		HashMap<String, String> map1 = new HashMap<String, String>();
		HashMap<String, String> map2 = new HashMap<String, String>();
		HashMap<String, String> map3 = new HashMap<String, String>();
		
		map1.put("user_name", "admin1");
		map1.put("user_ip", "192.168.24.214");
		
		map2.put("user_name", "admin2");
		map2.put("user_ip", "192.168.24.215");
		
		map3.put("user_name", "admin3");
		map3.put("user_ip", "192.168.24.216");
		
		list.add(map1);
		list.add(map2);
		list.add(map3);
		
		SimpleAdapter listAdapter = new SimpleAdapter(this, list, R.layout.user, new String[]{"user_name", "user_ip"}, new int[]{R.id.user_ip, R.id.user_name});
		setListAdapter(listAdapter);
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
		// TODO Auto-generated method stub
		super.onListItemClick(l, v, position, id);
		System.out.println("id:" + id);
		System.out.println("position:" + position);
	}
	
}